package filesystem

// 后缀对应的格式
var mimeTypes = map[string]string{
    "323":                    "text/h323",
    "3g2":                    "video/3gpp2",
    "3gp":                    "video/3gpp",
    "3gp2":                   "video/3gpp2",
    "3gpp":                   "video/3gpp",
    "7z":                     "application/x-7z-compressed",
    "aa":                     "audio/audible",
    "AAC":                    "audio/aac",
    "aaf":                    "application/octet-stream",
    "aax":                    "audio/vnd.audible.aax",
    "ac3":                    "audio/ac3",
    "aca":                    "application/octet-stream",
    "accda":                  "application/msaccess.addin",
    "accdb":                  "application/msaccess",
    "accdc":                  "application/msaccess.cab",
    "accde":                  "application/msaccess",
    "accdr":                  "application/msaccess.runtime",
    "accdt":                  "application/msaccess",
    "accdw":                  "application/msaccess.webapplication",
    "accft":                  "application/msaccess.ftemplate",
    "acx":                    "application/internet-property-stream",
    "AddIn":                  "text/xml",
    "ade":                    "application/msaccess",
    "adobebridge":            "application/x-bridge-url",
    "adp":                    "application/msaccess",
    "ADT":                    "audio/vnd.dlna.adts",
    "ADTS":                   "audio/aac",
    "afm":                    "application/octet-stream",
    "ai":                     "application/postscript",
    "aif":                    "audio/aiff",
    "aifc":                   "audio/aiff",
    "aiff":                   "audio/aiff",
    "air":                    "application/vnd.adobe.air-application-installer-package+zip",
    "amc":                    "application/mpeg",
    "anx":                    "application/annodex",
    "apk":                    "application/vnd.android.package-archive",
    "application":            "application/x-ms-application",
    "art":                    "image/x-jg",
    "asa":                    "application/xml",
    "asax":                   "application/xml",
    "ascx":                   "application/xml",
    "asd":                    "application/octet-stream",
    "asf":                    "video/x-ms-asf",
    "ashx":                   "application/xml",
    "asi":                    "application/octet-stream",
    "asm":                    "text/plain",
    "asmx":                   "application/xml",
    "aspx":                   "application/xml",
    "asr":                    "video/x-ms-asf",
    "asx":                    "video/x-ms-asf",
    "atom":                   "application/atom+xml",
    "au":                     "audio/basic",
    "avi":                    "video/x-msvideo",
    "axa":                    "audio/annodex",
    "axs":                    "application/olescript",
    "axv":                    "video/annodex",
    "bas":                    "text/plain",
    "bat":                    "text/plain",
    "bcpio":                  "application/x-bcpio",
    "bin":                    "application/octet-stream",
    "bmp":                    "image/bmp",
    "c":                      "text/plain",
    "cab":                    "application/octet-stream",
    "caf":                    "audio/x-caf",
    "calx":                   "application/vnd.ms-office.calx",
    "cat":                    "application/vnd.ms-pki.seccat",
    "cc":                     "text/plain",
    "cd":                     "text/plain",
    "cdda":                   "audio/aiff",
    "cdf":                    "application/x-cdf",
    "cer":                    "application/x-x509-ca-cert",
    "cfg":                    "text/plain",
    "chm":                    "application/octet-stream",
    "class":                  "application/x-java-applet",
    "clp":                    "application/x-msclip",
    "cmd":                    "text/plain",
    "cmx":                    "image/x-cmx",
    "cnf":                    "text/plain",
    "cod":                    "image/cis-cod",
    "config":                 "application/xml",
    "contact":                "text/x-ms-contact",
    "coverage":               "application/xml",
    "cpio":                   "application/x-cpio",
    "cpp":                    "text/plain",
    "crd":                    "application/x-mscardfile",
    "crl":                    "application/pkix-crl",
    "crt":                    "application/x-x509-ca-cert",
    "cs":                     "text/plain",
    "csdproj":                "text/plain",
    "csh":                    "application/x-csh",
    "csproj":                 "text/plain",
    "css":                    "text/css",
    "csv":                    "application/csv",
    "cur":                    "application/octet-stream",
    "cxx":                    "text/plain",
    "dat":                    "application/octet-stream",
    "datasource":             "application/xml",
    "dbproj":                 "text/plain",
    "dcr":                    "application/x-director",
    "def":                    "text/plain",
    "deploy":                 "application/octet-stream",
    "der":                    "application/x-x509-ca-cert",
    "dgml":                   "application/xml",
    "dib":                    "image/bmp",
    "dif":                    "video/x-dv",
    "dir":                    "application/x-director",
    "disco":                  "text/xml",
    "divx":                   "video/divx",
    "dll":                    "application/x-msdownload",
    "dll.config":             "text/xml",
    "dlm":                    "text/dlm",
    "doc":                    "application/msword",
    "docm":                   "application/vnd.ms-word.document.macroEnabled.12",
    "docx":                   "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
    "dot":                    "application/msword",
    "dotm":                   "application/vnd.ms-word.template.macroEnabled.12",
    "dotx":                   "application/vnd.openxmlformats-officedocument.wordprocessingml.template",
    "dsp":                    "application/octet-stream",
    "dsw":                    "text/plain",
    "dtd":                    "text/xml",
    "dtsConfig":              "text/xml",
    "dv":                     "video/x-dv",
    "dvi":                    "application/x-dvi",
    "dwf":                    "drawing/x-dwf",
    "dwg":                    "application/acad",
    "dwp":                    "application/octet-stream",
    "dxf":                    "application/x-dxf",
    "dxr":                    "application/x-director",
    "eml":                    "message/rfc822",
    "emz":                    "application/octet-stream",
    "eot":                    "application/vnd.ms-fontobject",
    "eps":                    "application/postscript",
    "etl":                    "application/etl",
    "etx":                    "text/x-setext",
    "evy":                    "application/envoy",
    "exe":                    "application/octet-stream",
    "exe.config":             "text/xml",
    "fdf":                    "application/vnd.fdf",
    "fif":                    "application/fractals",
    "filters":                "application/xml",
    "fla":                    "application/octet-stream",
    "flac":                   "audio/flac",
    "flr":                    "x-world/x-vrml",
    "flv":                    "video/x-flv",
    "fsscript":               "application/fsharp-script",
    "fsx":                    "application/fsharp-script",
    "generictest":            "application/xml",
    "gif":                    "image/gif",
    "go":                     "text/plain",
    "gpx":                    "application/gpx+xml",
    "group":                  "text/x-ms-group",
    "gsm":                    "audio/x-gsm",
    "gradle":                 "text/plain",
    "gtar":                   "application/x-gtar",
    "gz":                     "application/x-gzip",
    "h":                      "text/plain",
    "hdf":                    "application/x-hdf",
    "hdml":                   "text/x-hdml",
    "hhc":                    "application/x-oleobject",
    "hhk":                    "application/octet-stream",
    "hhp":                    "application/octet-stream",
    "hlp":                    "application/winhlp",
    "hpp":                    "text/plain",
    "hqx":                    "application/mac-binhex40",
    "hta":                    "application/hta",
    "htc":                    "text/x-component",
    "htm":                    "text/html",
    "html":                   "text/html",
    "htt":                    "text/webviewhtml",
    "hxa":                    "application/xml",
    "hxc":                    "application/xml",
    "hxd":                    "application/octet-stream",
    "hxe":                    "application/xml",
    "hxf":                    "application/xml",
    "hxh":                    "application/octet-stream",
    "hxi":                    "application/octet-stream",
    "hxk":                    "application/xml",
    "hxq":                    "application/octet-stream",
    "hxr":                    "application/octet-stream",
    "hxs":                    "application/octet-stream",
    "hxt":                    "text/html",
    "hxv":                    "application/xml",
    "hxw":                    "application/octet-stream",
    "hxx":                    "text/plain",
    "i":                      "text/plain",
    "ico":                    "image/x-icon",
    "ics":                    "application/octet-stream",
    "idl":                    "text/plain",
    "ief":                    "image/ief",
    "iii":                    "application/x-iphone",
    "inc":                    "text/plain",
    "inf":                    "application/octet-stream",
    "ini":                    "text/plain",
    "inl":                    "text/plain",
    "ins":                    "application/x-internet-signup",
    "ipa":                    "application/x-itunes-ipa",
    "ipg":                    "application/x-itunes-ipg",
    "ipproj":                 "text/plain",
    "ipsw":                   "application/x-itunes-ipsw",
    "iqy":                    "text/x-ms-iqy",
    "isp":                    "application/x-internet-signup",
    "ite":                    "application/x-itunes-ite",
    "itlp":                   "application/x-itunes-itlp",
    "itms":                   "application/x-itunes-itms",
    "itpc":                   "application/x-itunes-itpc",
    "IVF":                    "video/x-ivf",
    "jar":                    "application/java-archive",
    "java":                   "text/plain",
    "jck":                    "application/liquidmotion",
    "jcz":                    "application/liquidmotion",
    "jfif":                   "image/pjpeg",
    "jnlp":                   "application/x-java-jnlp-file",
    "jpb":                    "application/octet-stream",
    "jpe":                    "image/jpeg",
    "jpeg":                   "image/jpeg",
    "jpg":                    "image/jpeg",
    "js":                     "application/javascript",
    "json":                   "application/json",
    "jsx":                    "text/jscript",
    "jsxbin":                 "text/plain",
    "latex":                  "application/x-latex",
    "library-ms":             "application/windows-library+xml",
    "lit":                    "application/x-ms-reader",
    "loadtest":               "application/xml",
    "lpk":                    "application/octet-stream",
    "lsf":                    "video/x-la-asf",
    "lst":                    "text/plain",
    "lsx":                    "video/x-la-asf",
    "lzh":                    "application/octet-stream",
    "m13":                    "application/x-msmediaview",
    "m14":                    "application/x-msmediaview",
    "m1v":                    "video/mpeg",
    "m2t":                    "video/vnd.dlna.mpeg-tts",
    "m2ts":                   "video/vnd.dlna.mpeg-tts",
    "m2v":                    "video/mpeg",
    "m3u":                    "audio/x-mpegurl",
    "m3u8":                   "audio/x-mpegurl",
    "m4a":                    "audio/m4a",
    "m4b":                    "audio/m4b",
    "m4p":                    "audio/m4p",
    "m4r":                    "audio/x-m4r",
    "m4v":                    "video/x-m4v",
    "mac":                    "image/x-macpaint",
    "mak":                    "text/plain",
    "man":                    "application/x-troff-man",
    "manifest":               "application/x-ms-manifest",
    "map":                    "text/plain",
    "master":                 "application/xml",
    "mbox":                   "application/mbox",
    "mda":                    "application/msaccess",
    "mdb":                    "application/x-msaccess",
    "mde":                    "application/msaccess",
    "mdp":                    "application/octet-stream",
    "me":                     "application/x-troff-me",
    "mfp":                    "application/x-shockwave-flash",
    "mht":                    "message/rfc822",
    "mhtml":                  "message/rfc822",
    "mid":                    "audio/mid",
    "midi":                   "audio/mid",
    "mix":                    "application/octet-stream",
    "mk":                     "text/plain",
    "mmf":                    "application/x-smaf",
    "mno":                    "text/xml",
    "mny":                    "application/x-msmoney",
    "mod":                    "video/mpeg",
    "mov":                    "video/quicktime",
    "movie":                  "video/x-sgi-movie",
    "mp2":                    "video/mpeg",
    "mp2v":                   "video/mpeg",
    "mp3":                    "audio/mpeg",
    "mp4":                    "video/mp4",
    "mp4v":                   "video/mp4",
    "mpa":                    "video/mpeg",
    "mpe":                    "video/mpeg",
    "mpeg":                   "video/mpeg",
    "mpf":                    "application/vnd.ms-mediapackage",
    "mpg":                    "video/mpeg",
    "mpp":                    "application/vnd.ms-project",
    "mpv2":                   "video/mpeg",
    "mqv":                    "video/quicktime",
    "ms":                     "application/x-troff-ms",
    "msg":                    "application/vnd.ms-outlook",
    "msi":                    "application/octet-stream",
    "mso":                    "application/octet-stream",
    "mts":                    "video/vnd.dlna.mpeg-tts",
    "mtx":                    "application/xml",
    "mvb":                    "application/x-msmediaview",
    "mvc":                    "application/x-miva-compiled",
    "mxp":                    "application/x-mmxp",
    "nc":                     "application/x-netcdf",
    "nsc":                    "video/x-ms-asf",
    "nws":                    "message/rfc822",
    "ocx":                    "application/octet-stream",
    "oda":                    "application/oda",
    "odb":                    "application/vnd.oasis.opendocument.database",
    "odc":                    "application/vnd.oasis.opendocument.chart",
    "odf":                    "application/vnd.oasis.opendocument.formula",
    "odg":                    "application/vnd.oasis.opendocument.graphics",
    "odh":                    "text/plain",
    "odi":                    "application/vnd.oasis.opendocument.image",
    "odl":                    "text/plain",
    "odm":                    "application/vnd.oasis.opendocument.text-master",
    "odp":                    "application/vnd.oasis.opendocument.presentation",
    "ods":                    "application/vnd.oasis.opendocument.spreadsheet",
    "odt":                    "application/vnd.oasis.opendocument.text",
    "oga":                    "audio/ogg",
    "ogg":                    "audio/ogg",
    "ogv":                    "video/ogg",
    "ogx":                    "application/ogg",
    "one":                    "application/onenote",
    "onea":                   "application/onenote",
    "onepkg":                 "application/onenote",
    "onetmp":                 "application/onenote",
    "onetoc":                 "application/onenote",
    "onetoc2":                "application/onenote",
    "opus":                   "audio/ogg",
    "orderedtest":            "application/xml",
    "osdx":                   "application/opensearchdescription+xml",
    "otf":                    "application/font-sfnt",
    "otg":                    "application/vnd.oasis.opendocument.graphics-template",
    "oth":                    "application/vnd.oasis.opendocument.text-web",
    "otp":                    "application/vnd.oasis.opendocument.presentation-template",
    "ots":                    "application/vnd.oasis.opendocument.spreadsheet-template",
    "ott":                    "application/vnd.oasis.opendocument.text-template",
    "oxt":                    "application/vnd.openofficeorg.extension",
    "p10":                    "application/pkcs10",
    "p12":                    "application/x-pkcs12",
    "p7b":                    "application/x-pkcs7-certificates",
    "p7c":                    "application/pkcs7-mime",
    "p7m":                    "application/pkcs7-mime",
    "p7r":                    "application/x-pkcs7-certreqresp",
    "p7s":                    "application/pkcs7-signature",
    "pbm":                    "image/x-portable-bitmap",
    "pcast":                  "application/x-podcast",
    "pct":                    "image/pict",
    "pcx":                    "application/octet-stream",
    "pcz":                    "application/octet-stream",
    "pdf":                    "application/pdf",
    "pfb":                    "application/octet-stream",
    "pfm":                    "application/octet-stream",
    "pfx":                    "application/x-pkcs12",
    "pgm":                    "image/x-portable-graymap",
    "pic":                    "image/pict",
    "pict":                   "image/pict",
    "pkgdef":                 "text/plain",
    "pkgundef":               "text/plain",
    "pko":                    "application/vnd.ms-pki.pko",
    "pls":                    "audio/scpls",
    "pma":                    "application/x-perfmon",
    "pmc":                    "application/x-perfmon",
    "pml":                    "application/x-perfmon",
    "pmr":                    "application/x-perfmon",
    "pmw":                    "application/x-perfmon",
    "png":                    "image/png",
    "pnm":                    "image/x-portable-anymap",
    "pnt":                    "image/x-macpaint",
    "pntg":                   "image/x-macpaint",
    "pnz":                    "image/png",
    "pot":                    "application/vnd.ms-powerpoint",
    "potm":                   "application/vnd.ms-powerpoint.template.macroEnabled.12",
    "potx":                   "application/vnd.openxmlformats-officedocument.presentationml.template",
    "ppa":                    "application/vnd.ms-powerpoint",
    "ppam":                   "application/vnd.ms-powerpoint.addin.macroEnabled.12",
    "ppm":                    "image/x-portable-pixmap",
    "pps":                    "application/vnd.ms-powerpoint",
    "ppsm":                   "application/vnd.ms-powerpoint.slideshow.macroEnabled.12",
    "ppsx":                   "application/vnd.openxmlformats-officedocument.presentationml.slideshow",
    "ppt":                    "application/vnd.ms-powerpoint",
    "pptm":                   "application/vnd.ms-powerpoint.presentation.macroEnabled.12",
    "pptx":                   "application/vnd.openxmlformats-officedocument.presentationml.presentation",
    "prf":                    "application/pics-rules",
    "prm":                    "application/octet-stream",
    "prx":                    "application/octet-stream",
    "ps":                     "application/postscript",
    "py":                     "text/plain",
    "psc1":                   "application/PowerShell",
    "psd":                    "application/octet-stream",
    "psess":                  "application/xml",
    "psm":                    "application/octet-stream",
    "psp":                    "application/octet-stream",
    "pst":                    "application/vnd.ms-outlook",
    "pub":                    "application/x-mspublisher",
    "pwz":                    "application/vnd.ms-powerpoint",
    "qht":                    "text/x-html-insertion",
    "qhtm":                   "text/x-html-insertion",
    "qt":                     "video/quicktime",
    "qti":                    "image/x-quicktime",
    "qtif":                   "image/x-quicktime",
    "qtl":                    "application/x-quicktimeplayer",
    "qxd":                    "application/octet-stream",
    "ra":                     "audio/x-pn-realaudio",
    "ram":                    "audio/x-pn-realaudio",
    "rar":                    "application/x-rar-compressed",
    "ras":                    "image/x-cmu-raster",
    "rat":                    "application/rat-file",
    "rc":                     "text/plain",
    "rc2":                    "text/plain",
    "rct":                    "text/plain",
    "rdlc":                   "application/xml",
    "reg":                    "text/plain",
    "resx":                   "application/xml",
    "rf":                     "image/vnd.rn-realflash",
    "rgb":                    "image/x-rgb",
    "rgs":                    "text/plain",
    "rm":                     "application/vnd.rn-realmedia",
    "rmi":                    "audio/mid",
    "rmp":                    "application/vnd.rn-rn_music_package",
    "roff":                   "application/x-troff",
    "rpm":                    "audio/x-pn-realaudio-plugin",
    "rqy":                    "text/x-ms-rqy",
    "rtf":                    "application/rtf",
    "rtx":                    "text/richtext",
    "rvt":                    "application/octet-stream",
    "ruleset":                "application/xml",
    "s":                      "text/plain",
    "safariextz":             "application/x-safari-safariextz",
    "scd":                    "application/x-msschedule",
    "scr":                    "text/plain",
    "sct":                    "text/scriptlet",
    "sd2":                    "audio/x-sd2",
    "sdp":                    "application/sdp",
    "sea":                    "application/octet-stream",
    "searchConnector-ms":     "application/windows-search-connector+xml",
    "setpay":                 "application/set-payment-initiation",
    "setreg":                 "application/set-registration-initiation",
    "settings":               "application/xml",
    "sgimb":                  "application/x-sgimb",
    "sgml":                   "text/sgml",
    "sh":                     "text/plain",
    "shar":                   "application/x-shar",
    "shtml":                  "text/html",
    "sit":                    "application/x-stuffit",
    "sitemap":                "application/xml",
    "skin":                   "application/xml",
    "skp":                    "application/x-koan",
    "sldm":                   "application/vnd.ms-powerpoint.slide.macroEnabled.12",
    "sldx":                   "application/vnd.openxmlformats-officedocument.presentationml.slide",
    "slk":                    "application/vnd.ms-excel",
    "sln":                    "text/plain",
    "slupkg-ms":              "application/x-ms-license",
    "smd":                    "audio/x-smd",
    "smi":                    "application/octet-stream",
    "smx":                    "audio/x-smd",
    "smz":                    "audio/x-smd",
    "snd":                    "audio/basic",
    "snippet":                "application/xml",
    "snp":                    "application/octet-stream",
    "sol":                    "text/plain",
    "sor":                    "text/plain",
    "spc":                    "application/x-pkcs7-certificates",
    "spl":                    "application/futuresplash",
    "spx":                    "audio/ogg",
    "sql":                    "text/plain",
    "src":                    "application/x-wais-source",
    "srf":                    "text/plain",
    "SSISDeploymentManifest": "text/xml",
    "ssm":                    "application/streamingmedia",
    "sst":                    "application/vnd.ms-pki.certstore",
    "stl":                    "application/vnd.ms-pki.stl",
    "sv4cpio":                "application/x-sv4cpio",
    "sv4crc":                 "application/x-sv4crc",
    "svc":                    "application/xml",
    "svg":                    "image/svg+xml",
    "swf":                    "application/x-shockwave-flash",
    "step":                   "application/step",
    "stp":                    "application/step",
    "t":                      "application/x-troff",
    "tar":                    "application/x-tar",
    "tcl":                    "application/x-tcl",
    "testrunconfig":          "application/xml",
    "testsettings":           "application/xml",
    "tex":                    "application/x-tex",
    "texi":                   "application/x-texinfo",
    "texinfo":                "application/x-texinfo",
    "tgz":                    "application/x-compressed",
    "thmx":                   "application/vnd.ms-officetheme",
    "thn":                    "application/octet-stream",
    "tif":                    "image/tiff",
    "tiff":                   "image/tiff",
    "tlh":                    "text/plain",
    "tli":                    "text/plain",
    "toc":                    "application/octet-stream",
    "tr":                     "application/x-troff",
    "trm":                    "application/x-msterminal",
    "trx":                    "application/xml",
    "ts":                     "video/vnd.dlna.mpeg-tts",
    "tsv":                    "text/tab-separated-values",
    "ttf":                    "application/font-sfnt",
    "tts":                    "video/vnd.dlna.mpeg-tts",
    "txt":                    "text/plain",
    "u32":                    "application/octet-stream",
    "uls":                    "text/iuls",
    "user":                   "text/plain",
    "ustar":                  "application/x-ustar",
    "vb":                     "text/plain",
    "vbdproj":                "text/plain",
    "vbk":                    "video/mpeg",
    "vbproj":                 "text/plain",
    "vbs":                    "text/vbscript",
    "vcf":                    "text/x-vcard",
    "vcproj":                 "application/xml",
    "vcs":                    "text/plain",
    "vcxproj":                "application/xml",
    "vddproj":                "text/plain",
    "vdp":                    "text/plain",
    "vdproj":                 "text/plain",
    "vdx":                    "application/vnd.ms-visio.viewer",
    "vml":                    "text/xml",
    "vscontent":              "application/xml",
    "vsct":                   "text/xml",
    "vsd":                    "application/vnd.visio",
    "vsi":                    "application/ms-vsi",
    "vsix":                   "application/vsix",
    "vsixlangpack":           "text/xml",
    "vsixmanifest":           "text/xml",
    "vsmdi":                  "application/xml",
    "vspscc":                 "text/plain",
    "vss":                    "application/vnd.visio",
    "vsscc":                  "text/plain",
    "vssettings":             "text/xml",
    "vssscc":                 "text/plain",
    "vst":                    "application/vnd.visio",
    "vstemplate":             "text/xml",
    "vsto":                   "application/x-ms-vsto",
    "vsw":                    "application/vnd.visio",
    "vsx":                    "application/vnd.visio",
    "vtx":                    "application/vnd.visio",
    "wav":                    "audio/wav",
    "wave":                   "audio/wav",
    "wax":                    "audio/x-ms-wax",
    "wbk":                    "application/msword",
    "wbmp":                   "image/vnd.wap.wbmp",
    "wcm":                    "application/vnd.ms-works",
    "wdb":                    "application/vnd.ms-works",
    "wdp":                    "image/vnd.ms-photo",
    "webarchive":             "application/x-safari-webarchive",
    "webm":                   "video/webm",
    "webp":                   "image/webp",
    "webtest":                "application/xml",
    "wiq":                    "application/xml",
    "wiz":                    "application/msword",
    "wks":                    "application/vnd.ms-works",
    "WLMP":                   "application/wlmoviemaker",
    "wlpginstall":            "application/x-wlpg-detect",
    "wlpginstall3":           "application/x-wlpg3-detect",
    "wm":                     "video/x-ms-wm",
    "wma":                    "audio/x-ms-wma",
    "wmd":                    "application/x-ms-wmd",
    "wmf":                    "application/x-msmetafile",
    "wml":                    "text/vnd.wap.wml",
    "wmlc":                   "application/vnd.wap.wmlc",
    "wmls":                   "text/vnd.wap.wmlscript",
    "wmlsc":                  "application/vnd.wap.wmlscriptc",
    "wmp":                    "video/x-ms-wmp",
    "wmv":                    "video/x-ms-wmv",
    "wmx":                    "video/x-ms-wmx",
    "wmz":                    "application/x-ms-wmz",
    "woff":                   "application/font-woff",
    "wpl":                    "application/vnd.ms-wpl",
    "wps":                    "application/vnd.ms-works",
    "wri":                    "application/x-mswrite",
    "wrl":                    "x-world/x-vrml",
    "wrz":                    "x-world/x-vrml",
    "wsc":                    "text/scriptlet",
    "wsdl":                   "text/xml",
    "wvx":                    "video/x-ms-wvx",
    "x":                      "application/directx",
    "xaf":                    "x-world/x-vrml",
    "xaml":                   "application/xaml+xml",
    "xap":                    "application/x-silverlight-app",
    "xbap":                   "application/x-ms-xbap",
    "xbm":                    "image/x-xbitmap",
    "xdr":                    "text/plain",
    "xht":                    "application/xhtml+xml",
    "xhtml":                  "application/xhtml+xml",
    "xla":                    "application/vnd.ms-excel",
    "xlam":                   "application/vnd.ms-excel.addin.macroEnabled.12",
    "xlc":                    "application/vnd.ms-excel",
    "xld":                    "application/vnd.ms-excel",
    "xlk":                    "application/vnd.ms-excel",
    "xll":                    "application/vnd.ms-excel",
    "xlm":                    "application/vnd.ms-excel",
    "xls":                    "application/vnd.ms-excel",
    "xlsb":                   "application/vnd.ms-excel.sheet.binary.macroEnabled.12",
    "xlsm":                   "application/vnd.ms-excel.sheet.macroEnabled.12",
    "xlsx":                   "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
    "xlt":                    "application/vnd.ms-excel",
    "xltm":                   "application/vnd.ms-excel.template.macroEnabled.12",
    "xltx":                   "application/vnd.openxmlformats-officedocument.spreadsheetml.template",
    "xlw":                    "application/vnd.ms-excel",
    "xml":                    "text/xml",
    "xmp":                    "application/octet-stream",
    "xmta":                   "application/xml",
    "xof":                    "x-world/x-vrml",
    "XOML":                   "text/plain",
    "xpm":                    "image/x-xpixmap",
    "xps":                    "application/vnd.ms-xpsdocument",
    "xrm-ms":                 "text/xml",
    "xsc":                    "application/xml",
    "xsd":                    "text/xml",
    "xsf":                    "text/xml",
    "xsl":                    "text/xml",
    "xslt":                   "text/xml",
    "xsn":                    "application/octet-stream",
    "xss":                    "application/xml",
    "xspf":                   "application/xspf+xml",
    "xtp":                    "application/octet-stream",
    "xwd":                    "image/x-xwindowdump",
    "z":                      "application/x-compress",
    "zip":                    "application/zip",
}

// 添加数据
func AddMimeType(ext string, mime string) {
    mimeTypes[ext] = mime
}

// 获取后缀对应的格式
func GetMimeType(extension string) string {
    if mimeType, ok := mimeTypes[extension]; ok {
        return mimeType
    } else {
        return "Unknown"
    }
}

// 获取格式对应的后缀
func GetMimeExtension(mime string) string {
    for ext, mimeType := range mimeTypes {
        if mimeType == mime {
            return ext
        }
    }

    return "Unknown"
}
